Concrete
As a topping , and top concrete is concrete referred to, which is applied subsequently to an existing solid concrete layer. This method is often used to increase the load-bearing capacity of concrete structures. In- situ concrete is added to the plan, especially for prefabricated ceilings .
Particular attention must be paid to the bonded joint. In particular, it must be free from contamination by foreign matter and the old concrete should be pre-wetted.
If the bond is not ensured by means of reinforcement or dowels, the surface of the old concrete must be specially treated. Various methods are available for this.
Mechanical roughening process of the substrate
Other methods of roughening the substrate
- High pressure water jets
- Sandblasting
- Shot peening